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Author Topic: Any project for electronic platting?  (Read 377 times)
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lifeguard
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« on: July 09, 2016, 06:33:52 18:33 »

Hi.

I'm researching for electronic platting to make homemade troughholes in my PCB's. I alread have chemicals and other needs, but I'm stoping at eletronic platting.
I know that I can simples use 12v battery with my chemicals (copper sulfate and HCL), but that's not the right way. I also found a very usefull site that explain how to do all the steps, including electronic platting.....but the schema on this sites uses PIC18F26K22, which is very hard to find here in Brazil. The 'problem' with other controlers like arduino, acording to author of this site, is the frequency that's not enought to get 100Khz with high resolution. Electronic platting needs 10uS resolution to make positive and negative pulses, that's way he use this PIC (that run at 64Mhz).
I'm not sure if I can post link to this site. But the main question is: does anybody know or have a project for electronic platting with common components?
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chicane
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« Reply #1 on: July 09, 2016, 06:49:16 18:49 »

Nothing wrong with posting links related to your project. I haven't any experience plating through holes, would be interested to see how they do it.
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lifeguard
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« Reply #2 on: July 09, 2016, 06:58:35 18:58 »

Great Smiley
Here's the site: www.engenhariacaseira.com.br

There's a step-by-step how to buy or make chemicals and all proccess. I'm now fluent in english, but I can help translating something from portugueses if anybody needs.
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motox
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« Reply #3 on: July 09, 2016, 08:36:35 20:36 »

The source code for the PIC18F26K22 is available in the website.
It should be fairly easy to adapt the code for other PIC18F, e.g. PIC18F4550.
According to a post on your personal webpage you have access to this PIC. It has enough timers and two CCP modules.
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lifeguard
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« Reply #4 on: July 09, 2016, 08:38:56 20:38 »

The source code for the PIC18F26K22 is available in the website.
It should be fairly easy to adapt the code for other PIC18F, e.g. PIC18F4550.
According to a post on your personal webpage you have access to this PIC. It has enough timers and two CCP modules.

motox, is not my site, but from another Brazilian. We also discussed on 'comments' about problem with resolution of PWM. Maybe with 48Mhz of 4550 it could be done, but I've not tested yet. I asked about another project because Arduino is very popular and maybe there was another project done for this.
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motox
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« Reply #5 on: July 10, 2016, 01:28:27 01:28 »

I think you cannot get a PWM frequency of 100 kHz with a typical Arduino.
But Iím not an Arduino expert, because I donít like that platform. Not because of the hardware itself, but because of the bad quality code that I see around it.

motox, is not my site
I believe this link is to your personal webpage:
https://www.jonis.com.br/2008/05/21/pic-usb-bootloader-facil/#more-55
Thatís why I recommended you to use the PIC18F4550.
If you want to adapt the code for this PIC I can give you some help.

Running at 48 MHz you can get a 100 kHz PWM with a resolution of 8.9 bits:
log(48e6/100e3)/log(2) = 8.9 bits
which results in a resolution of: 10e-6/2^8.9 = ~21 ns.
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lifeguard
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« Reply #6 on: July 10, 2016, 03:32:27 15:32 »

You're right, this is my site. It's been a couple of years since I don't work/study with PIC's aymore, but It's true, I have some spares and I'll try to make work with it.
Back when I started with those PIC's I didn't had any struments to test or study and making PCB's was the worst Sad
Now I have dry film, laminator, and even a 100Mhs osciloscope  Cheesy
A lot easier to 'learn' again Smiley
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PICker
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« Reply #7 on: July 10, 2016, 05:47:52 17:47 »

HAve a look to these links:
http://hackaday.com/2012/10/03/through-hole-electroplating-in-your-home-lab/
http://www.thinktink.com/stack/volumes/volvi/copplate.htm
http://twilightrobotics.com/prototyping/electroplating1
http://twilightrobotics.com/prototyping/electroplating2
http://twilightrobotics.com/prototyping/electroplating3
http://twilightrobotics.com/prototyping/electroplating4
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